|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* League.Csv (https://csv.thephpleague.com). |
|
5
|
|
|
* |
|
6
|
|
|
* @author Ignace Nyamagana Butera <[email protected]> |
|
7
|
|
|
* @license https://github.com/thephpleague/csv/blob/master/LICENSE (MIT License) |
|
8
|
|
|
* @version 9.1.5 |
|
9
|
|
|
* @link https://github.com/thephpleague/csv |
|
10
|
|
|
* |
|
11
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
12
|
|
|
* file that was distributed with this source code. |
|
13
|
|
|
*/ |
|
14
|
|
|
|
|
15
|
|
|
declare(strict_types=1); |
|
16
|
|
|
|
|
17
|
|
|
namespace League\Csv; |
|
18
|
|
|
|
|
19
|
|
|
use InvalidArgumentException; |
|
20
|
|
|
use function array_fill_keys; |
|
21
|
|
|
use function array_keys; |
|
22
|
|
|
use function array_map; |
|
23
|
|
|
use function array_merge; |
|
24
|
|
|
use function array_unique; |
|
25
|
|
|
use function is_object; |
|
26
|
|
|
use function is_string; |
|
27
|
|
|
use function method_exists; |
|
28
|
|
|
use function sprintf; |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* A League CSV formatter to tackle CSV Formula Injection. |
|
32
|
|
|
* |
|
33
|
|
|
* @see http://georgemauer.net/2017/10/07/csv-injection.html |
|
34
|
|
|
* |
|
35
|
|
|
* @package League.csv |
|
36
|
|
|
* @since 9.1.0 |
|
37
|
|
|
* @author Ignace Nyamagana Butera <[email protected]> |
|
38
|
|
|
*/ |
|
39
|
|
|
class EscapeFormula |
|
40
|
|
|
{ |
|
41
|
|
|
/** |
|
42
|
|
|
* Spreadsheet formula starting character. |
|
43
|
|
|
*/ |
|
44
|
|
|
const FORMULA_STARTING_CHARS = ['=', '-', '+', '@']; |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* Effective Spreadsheet formula starting characters. |
|
48
|
|
|
* |
|
49
|
|
|
* @var array |
|
50
|
|
|
*/ |
|
51
|
|
|
protected $special_chars = []; |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* Escape character to escape each CSV formula field. |
|
55
|
|
|
* |
|
56
|
|
|
* @var string |
|
57
|
|
|
*/ |
|
58
|
|
|
protected $escape; |
|
59
|
|
|
|
|
60
|
|
|
/** |
|
61
|
|
|
* New instance. |
|
62
|
|
|
* |
|
63
|
|
|
* @param string $escape escape character to escape each CSV formula field |
|
64
|
|
|
* @param string[] $special_chars additional spreadsheet formula starting characters |
|
65
|
|
|
* |
|
66
|
|
|
*/ |
|
67
|
12 |
|
public function __construct(string $escape = "\t", array $special_chars = []) |
|
68
|
|
|
{ |
|
69
|
12 |
|
$this->escape = $escape; |
|
70
|
12 |
|
if ([] !== $special_chars) { |
|
71
|
9 |
|
$special_chars = $this->filterSpecialCharacters(...$special_chars); |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
6 |
|
$chars = array_merge(self::FORMULA_STARTING_CHARS, $special_chars); |
|
75
|
6 |
|
$chars = array_unique($chars); |
|
76
|
6 |
|
$this->special_chars = array_fill_keys($chars, 1); |
|
77
|
6 |
|
} |
|
78
|
|
|
|
|
79
|
|
|
/** |
|
80
|
|
|
* Filter submitted special characters. |
|
81
|
|
|
* |
|
82
|
|
|
* @param string ...$characters |
|
83
|
|
|
* |
|
84
|
|
|
* @throws InvalidArgumentException if the string is not a single character |
|
85
|
|
|
* |
|
86
|
|
|
* @return string[] |
|
87
|
|
|
*/ |
|
88
|
6 |
|
protected function filterSpecialCharacters(string ...$characters): array |
|
89
|
|
|
{ |
|
90
|
6 |
|
foreach ($characters as $str) { |
|
91
|
6 |
|
if (1 != strlen($str)) { |
|
92
|
6 |
|
throw new InvalidArgumentException(sprintf('The submitted string %s must be a single character', $str)); |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
|
96
|
3 |
|
return $characters; |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
|
|
/** |
|
100
|
|
|
* Returns the list of character the instance will escape. |
|
101
|
|
|
* |
|
102
|
|
|
* @return string[] |
|
103
|
|
|
*/ |
|
104
|
3 |
|
public function getSpecialCharacters(): array |
|
105
|
|
|
{ |
|
106
|
3 |
|
return array_keys($this->special_chars); |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
/** |
|
110
|
|
|
* Returns the escape character. |
|
111
|
|
|
*/ |
|
112
|
3 |
|
public function getEscape(): string |
|
113
|
|
|
{ |
|
114
|
3 |
|
return $this->escape; |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
|
|
/** |
|
118
|
|
|
* League CSV formatter hook. |
|
119
|
|
|
* |
|
120
|
|
|
* @see escapeRecord |
|
121
|
|
|
*/ |
|
122
|
3 |
|
public function __invoke(array $record): array |
|
123
|
|
|
{ |
|
124
|
3 |
|
return $this->escapeRecord($record); |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
/** |
|
128
|
|
|
* Escape a CSV record. |
|
129
|
|
|
*/ |
|
130
|
6 |
|
public function escapeRecord(array $record): array |
|
131
|
|
|
{ |
|
132
|
6 |
|
return array_map([$this, 'escapeField'], $record); |
|
133
|
|
|
} |
|
134
|
|
|
|
|
135
|
|
|
/** |
|
136
|
|
|
* Escape a CSV cell. |
|
137
|
|
|
*/ |
|
138
|
6 |
|
protected function escapeField($cell) |
|
139
|
|
|
{ |
|
140
|
6 |
|
if (!$this->isStringable($cell)) { |
|
141
|
6 |
|
return $cell; |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
6 |
|
$str_cell = (string) $cell; |
|
145
|
6 |
|
if (isset($str_cell[0], $this->special_chars[$str_cell[0]])) { |
|
146
|
6 |
|
return $this->escape.$str_cell; |
|
147
|
|
|
} |
|
148
|
|
|
|
|
149
|
6 |
|
return $cell; |
|
150
|
|
|
} |
|
151
|
|
|
|
|
152
|
|
|
/** |
|
153
|
|
|
* Tell whether the submitted value is stringable. |
|
154
|
|
|
*/ |
|
155
|
6 |
|
protected function isStringable($value): bool |
|
156
|
|
|
{ |
|
157
|
6 |
|
return is_string($value) || (is_object($value) && method_exists($value, '__toString')); |
|
158
|
|
|
} |
|
159
|
|
|
} |
|
160
|
|
|
|
thephpleague /
csv
